Process for the manufacture of round cornered cards



Patented July 26, Y1932 UNITED STATES PATENT OFFICE GUSTAVE A. WILKE, OF MILWAUKEE, WISCONSIN, ASSIGN OR TO LEADER CARD WORKS,

OF MILWAUKEE, WISCONSIN, A. CORPORATION OF WISCONSIN PROCESS FOR THE MAN UFACT'URE OF ROUND CORNERED CARDS Application :filed May 20,

This invention relates to improvements in blanks for round cornered cards and processes for the manufact-ure of such cards.

In my co-pending application for United States Letters Patent, Serial Number 432,356, filed March 1st, 1930, I have disclosed a multiple bla-nk for the manufacture of round cornered cards in which the individual cards have their corners rounded and are joined by an intervening web from which each card in turn may be severed by a knife, the web being just sufficiently wide to absorb the distortion produced by the knife cut, whereby to leave each card with clean cut edges.

The present invention seeks to eliminate ythe necessity Vof making two separate knife cuts by providing a blank wherein the individual card elements are joined by a web which is transversely scored whereby to permit the manufactured cards by a process involving the breaking of the blank and the subsequent trimming of the card units in a single operation. i

In the drawing:

Figure 1 is a perspective view of a stack of card blanks made in accordance with this invention.

Figure 2 is a perspective view showing the separation of the component units of such a blank.

Figure 3 is a. perspective view showing the subsequent trimming operation of all of the blanks following their separation.

Like parts are identified by the same reference characters throughout the several views. Y

The stack shown in'Figure l comprises a plurality of blanks each of which contains card units 4 having four rounded corners at 5 and joinedby a web 6 which is suficiently narrower than the blank to permit the formation of a full round corner on each unit.

Each of the webs 6 is traversed by a score line 7 upon which the individual card units are severable. It would not be necessary to provide any intervening web for the practice of this invention except for the difficulty and expense of making the score line exactly 1931. Serial No. 538,761.

tangent to the rounded corners of the several units comprising the blank. The web 6 makes allowance for any slight ordinary variations or inaccuracies in the scoring equipment so that regardless of such inaccuracies the score line will not intersect the boundaries of the finished card at any point.

A stack such as that shown in Figure l may readily be broken into two stacks with the operators fingers. If the two stacks are'then superimposed as shown in Figure 8, a single operation of the cutting knife 8 on the die block 9 will trim from all the card units such portions of the web 6 as may remain adhering thereto.

By means of this invention the cards may be printed in multiple units separated byv hand during the transfer from the printing press to the trimming die block and thereafter trimmed in a single operation, thus eliminating one of the operations required in the use'of the invention disclosed in the copending application above referred to.

I claim:

1. The process of manufacturing round cornered cards which consists in forming a blank comprising a plurality of card units with individually rounded corners, said units being integrally connected by an intervening web, scoring the web, breaking the units upon the score line, superimposing the separated units and trimming the fragments of the web therefrom in a single operation.

2. The process of manufacturing round cornered smooth edge cards which includes the forming of a blank comprising a plurality of card -units having individually rounded corners and integrally joined by an intervening web portion, the scoring of the web portion of the blank between the units, the subsequent separation of the units by breaking the blank upon its score line, and the subsequent trimming of the web portions from the units.

GUSTAVE A. WILKE. 

